I did a car this past summer which needed some work. I just finished using MMPPC, and started with DACP when the neighbors asked what kind of wax I using to make the car look new. I told the neighbor, that I was not at the protecting stage. I explained to the neighbor that prep 90% percent of the job. Start with a good foundation and the end result will be 100% better.
I think Intel has pictures of a truck which is just polished.
Eric